Electric-ligi  ting apparatus



Patented May 23, I899.

A. PLECHER.

ELECTRIC LIGHTING APPARATUS.

(Application filed Oct. 4, 1898.)

(No Model.)

IN VE/VTOI? WITNESSES A TTOHNEYS.

we uonms PETERS cu. PHOTO-LlTNO-. wasmrmon. 0.1:.

. scribed with reference to the drawings, in

Braunschweig, Germany. Any-other equiva- UNITED STATES PATENT OFFICE,

ANDREW PLECHER, or SAVANNAH,- GEORGIA.

ztEoTmc-uemmc AP'PA R'ATUS.

SPECIFICATION forming part of Letters PatntNo. 625,599, dated May 2. 189d.

Application filed October 4, 1898.

T0 wZZ whom it may concern:

Be it known that 1, ANDREW PLEOHER, of Savannah, in the county of Chatham and State of Georgia, have invented a new and useful Improvement in X-Ray-Lighting Apparatus, of which the following is a specification.

My invention is in the nature of an apparatus which is designed to be employed for purposes of special X-ray illumination or for the purposes of general illumination, as electric lamps; and it consists in the peculiar construction and arrangement hereinafter dewhich Figure 1 is a side view of two of the apparatus connected in series as electric lamps' Figs. 2 and 3 are side views, respectively, of two modifications of the same; and Fig. 4. is a sectional view of an induction-coil.

Referring to Fig. 1, A is a Crookes vacuum tube or bulb. C is an electromagnet sealed tightly within the walls of the vacuum-bulb and having its helix connected to the primary wire B and bearing on the inner end of its pole the convex plate E, whose surface is to be covered with a substance which fluoresces or shines by the bombardment of the cathode ray. For such purpose I use a substance known on the market as Christaux do Sidot, made by Louis Miiller-Unkel,

lent substance may, however, be employed, such as the sulfates and sulfids of calcium, barium, and strontium, or the calcium wolfromate, (tungstate) Enteringthe vacuumbulb from opposite sides are the cathode-terminals D D. These are tightly sealed in the glass, and the external wire with which they connect extends along the line-circuit from one lamp to the next. They are fully insulated and are wrapped around the primary wire B in the shape of a coil all along the primary wire 13' as it extends from one lamp to the next. This forms a sort of greatlyelongated induction-coil between any two lamps. The outer terminals of the primary wire 13, B or B are extended to and connected with the opposite poles of a pole-changing dynamo, and the outer terminals of the secondary wire are connected to each other to complete the secondary circuit. The cathode rays as they radiate from the terminals seritiimsoaeso. (Nomodelil D within the bulb are deflected laterally by the influence of the magnet C and in bom" right-angular position to the magnet G, asin Fig. 1, I may arrange them as in Fig. 2,where one of the terminals of the secondary wire is carried to the core of the magnet, which then becomes a cathode-terminal, or, if desired, both said terminals .may be carried to the cores of diametrically-placed electromagnets, as shown at (J C in Fig. 3.

As a further modification the end portion of one or both the secondary wires may first be wrapped orlaid in coils around the primary coil of the magnet and then extended to the core or pole, as seen in Fig. 4, in which case the magnet becomes an induction-coil O In this figure, B is the primary wire, and D the secondary, which is not only wound around the primary between lamps, but is wound around the primary wire itself as it lies in the helix, the end 00 being attached to the core and the other end y forming the opposing cathode. When so employed, the electriclighting apparatus is converted into a novel form of X-ray apparatus. It is known that a secondary current passing through a vacuum-tube is influenced bya magnet in regard to direction as well as in regard to its lightgiving properties. Therefore in placing a magnet at each pole, or rather in making the secondary current from a pole-changing dynamo to traversethe cores of the two magnets, then, according to known facts, the resistance in the vacuum -tube becomes considerably less and the invisible rays are turned into white light.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. An electric lamp comprising a vacuumbulb, an electromagnet having one pole within said bulb and provided with a light-emitting surface as described and its helix arranged in a primary circuit wire, an insulated secondary wire wound around the primary wire throughout its length between lamps,and extending the full length of said primary wire between lamps, and provided within the bulb one or both of which is coincident with the pole or poles of the electromagnets substantially as and for the purpose described.

3. An electric X-ray lamp comprising a vacuum-bulb with two cathode-terminals, and one or more electromagnets wrapped to form induction-coils having each one pole within the bulb and provided with a light-emitting surface as described, said induction-coilhaving a central core, a helix connecting with a primary wire another helix connecting with the secondary wire, the end of said secondary helix being connected to the core of the in duction-coil and forming the cathode-terminal substantially as and for the purpose described.

4. An electric X-raylamp comprising a vacuum-bulb with two cathode-terminals, one or more electromagnets wrapped to form induction-coils having each one pole within the bulb and provided with a light-emitting surface as described, said induction-coil having a cen-' tral core, a helix connecting with a primary wire extending bet-ween lamps, another helix connecting with a secondary wire wound around the primary Wire and extending with it between lamps, the end of said secondary helix being connected to the core of the in= duction-coil and forming the cathode-terminal substantially as and for the purpose de scribed.

ANDREW PLEOHER.

Witnesses:

JAMES J ULLA MOGINLEY, CLINTON C. WIEGEL. 

